we never nip the evil in the bud. we always let the evil grow to its full potential and then we try to take it down. sometimes we become successful but after losing too much such as in case of mqm and sometimes we fail miserably as in 71. whosoever challenges the writ of the state must be dealt with iron hand . ptm has opened fire on military . there are clear laws about it. just arrest them, put them in jails and start cases in ATC and punish them according to law but giving free hands to them or offering dialogue (which is most likely going to happen) will allow them to flourish further.